[sdiy] Clipping summing opamp issue..

[Dave Manley]

Tom Wiltshire wrote:
> Alternatively, you could have a rotary switch to select different 
> op-amp feedback resistors for different numbers of inputs.
> Then you could just select "3 inputs" or "5 inputs" or whatever, and 
> have the right amount of headroom in the mixer.
>
If you have switching jacks on the input (and aren't using them for 
normalization), you could automatically detect when an input was in use 
and adjust the gain appropriately.  No big, expensive rotary switch...

-Dave